Question 288General Subjects - 1st Asst/Chief
70% to passWhich of the following maintenance criteria would be the basis of planned maintenance?
AEngine mounted sensor data
BLubricating oil analysis
CVibration analysis
DEquipment running hours
AI Explanation
The correct answer is D) Equipment running hours. Planned maintenance is typically based on the equipment's running hours or time in service, rather than on sensor data, oil analysis, or vibration analysis. These latter criteria are more indicative of the actual condition of the equipment and would be used for condition-based maintenance, not necessarily for planned maintenance schedules. Equipment running hours provide a reliable indicator of when maintenance should be performed, as components have predictable wear rates based on usage.
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